MATERIAL - The slide gate wheel type v is made of steel and zinc plated, with good toughness, in golden luster, smooth, simple and beautiful. GOOD BEARING CAPACITY - You will get 2pcs v track roller wheels, each wheel diameter is 88mm/3.5 inches and has a strong loading capacity, the height is 102mm/4 inches, the mounting bracket length is 131mm/ 5.2 inches. PRACTICAL V GROOVE DESIGN - Fits inverted tracks and can reduce the vibration and noise for smooth operation, which will create a silent work and life environment for you. WIDELY USED - These v groove track wheels are easy to mount or disassemble with 9mm installation holes on the base, great for rolling gates, barn doors, assembly fixtures, truck containers, racks, rails etc V Type Sliding Gate Roller